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Microchip Technology 1N986B
- Part No.:
- 1N986B
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N986B.pdf
- Description:
- DIODE ZENER 110V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:8,015
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Product details
Overview
1N986B from Microsemi is a silicon 500 mW axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 110 V nominal Zener voltage with ±5% tolerance, 1.1 mA Zener test current, 750 Ω dynamic impedance at IZT, and +0.11 %/°C temperature coefficient. It regulates voltage in precision reference and overvoltage protection circuits across industrial power supplies and instrumentation.
For engineers reviewing the 1N986B datasheet, 1N986B pinout, 1N986B application, or 1N986B equivalent, key selection criteria include its 110 V Zener voltage stability over -65°C to +175°C, low 5 μA reverse leakage at 83.6 V, and compatibility with standard axial-leaded PCB mounting and wave soldering per MIL-STD-750.
Technical Context
The 1N986B operates as a two-terminal voltage reference device, conducting in reverse breakdown when cathode voltage exceeds anode by ≥110 V. Its Zener knee is stabilized by diffusion-doped silicon junction design, with thermal resistance of 250 °C/W (junction-to-lead) enabling reliable operation up to 175 °C ambient.
It exhibits a positive temperature coefficient (+0.11 %/°C), indicating Zener voltage increases linearly with junction temperature - a critical factor in high-temperature voltage reference designs where drift compensation is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 110 V ±5% - defines regulated output voltage under 1.1 mA test current; used for mid-range HV reference generation |
| Zener Test Current (IZT) | 1.1 mA - minimum current needed to achieve specified VZ; sets bias point for stable regulation |
| Zener Impedance (ZZT) | 750 Ω @ IZT - indicates voltage variation per mA change in current; impacts regulation accuracy under load shifts |
| Max DC Zener Current (IZM) | 3.3 mA - maximum continuous reverse current before exceeding 400 mW dissipation at 75°C lead temp |
| Reverse Leakage Current | 5 μA @ 83.6 V - ensures minimal parasitic current below knee voltage; critical for low-power standby circuits |
| Temp. Coefficient (αVZ) | +0.11 %/°C - quantifies VZ drift with temperature; requires derating or compensation above 25°C |
| Power Dissipation | 500 mW @ TL < 50°C (3/8″ lead length) - defines thermal design margin for PCB trace width and copper pad area |
Pinout & Package
Package: DO-35 (DO-204AH), hermetically sealed glass axial-leaded case with cathode band marking. Tin-lead or RoHS-compliant matte-tin plating, weight 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common; reverse-biased relative to cathode during regulation |
| Cathode | Zener breakdown terminal / Regulated output node | Banded end; held at stable 110 V above anode when reverse current ≥1.1 mA |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N986B series | Ensures standardized electrical behavior and interchangeability across qualified suppliers |
| ±5% Zener voltage tolerance (B suffix) | Enables predictable regulation without post-manufacture trimming in cost-sensitive applications |
| Operating temperature range: –65°C to +175°C | Supports deployment in aerospace, downhole, and industrial environments without derating |
| Nonsensitive to ESD per MIL-STD-750 Method 1020 | Eliminates need for external ESD protection in handling and assembly |
| Minimal capacitance (typ. <5 pF) | Maintains high-frequency stability in RF bias and fast transient suppression circuits |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stable 110 V reference for feedback loop in isolated DC-DC converters operating from 120–240 VAC inputs. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing precise voltage setpoint to error amplifier. Use Value: Maintains ±0.55 V regulation accuracy over full temperature range, reducing output drift in unregulated auxiliary rails. |
Use Scenario: Clamping transient surges on 100 V DC bus lines in motor drives exposed to inductive kickback. IC Role / Device Role / Timing Role: Passive overvoltage clamp absorbing energy until crowbar or shutdown activates. Use Value: Limits peak voltage to ≤115 V with 3.3 mA max clamping current, preventing MOSFET gate oxide failure. |
| High-Temperature Sensor Biasing | Calibration Voltage Standard |
Use Scenario: Providing excitation voltage to RTD or strain gauge bridges in oil & gas downhole tools operating at 150°C. IC Role / Device Role / Timing Role: Precision current source via series resistor + Zener reference configuration. Use Value: Delivers stable 110 V bias with +0.11 %/°C drift compensated by system calibration lookup tables. |
Use Scenario: Field-portable multimeter calibration fixture requiring traceable 110 V reference under lab conditions. IC Role / Device Role / Timing Role: Primary shunt reference element in 4-wire Kelvin-connected test setup. Use Value: Achieves ±0.55 V absolute accuracy with 5 μA leakage ensuring minimal loading error on high-impedance DMM inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N986A | ±10% Zener voltage tolerance vs. ±5% for 1N986B; otherwise identical electrical and thermal specs | Acceptable where system-level tolerance budget allows ±11 V variation instead of ±5.5 V | Select 1N986A only if cost sensitivity outweighs regulation precision requirements |
| 1N986C | ±2% Zener voltage tolerance; same 110 V nominal, 1.1 mA IZT, and +0.11 %/°C αVZ | Suitable for metrology-grade references where tighter initial accuracy reduces calibration effort | Choose 1N986C when long-term stability and reduced binning overhead justify premium pricing |
Compared with 1N986A and 1N986C, the 1N986B delivers optimal balance of accuracy, cost, and availability for general-purpose 110 V regulation - neither over-spec'd nor under-spec'd for most industrial feedback and clamp functions.
Availability
1N986B is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, high-temperature sensor biasing, and calibration voltage standards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N986B includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N957B–1N992B series was designed specifically for ruggedized, high-temperature voltage regulation and reference applications where hermetic sealing, radiation hardness, and JEDEC-standard consistency are mandatory.
FAQ
What is the Zener voltage tolerance for 1N986B?
The 1N986B has a nominal Zener voltage of 110 V with a tolerance of ±5%, indicated by the "B" suffix per JEDEC standard. This means the actual measured Zener voltage at 1.1 mA test current falls between 104.5 V and 115.5 V at 25°C. The tolerance remains valid across the full operating temperature range of –65°C to +175°C, though voltage drift due to temperature coefficient must be accounted for in final design margins.
Can 1N986B be used in surface-mount designs?
No, the 1N986B is packaged exclusively in the axial-leaded DO-35 (DO-204AH) glass case and is not a surface-mount device. For SMT equivalents, Microsemi offers the MLL986B series in DO-213AA (MELF) package. The 1N986B requires through-hole mounting with 3/8″ lead length from body for thermal rating compliance, and its mechanical construction does not support reflow or vapor-phase soldering processes.
What is the maximum surge current rating for 1N986B?
The 1N986B has a maximum surge current (IZSM) rating of 16 A, defined for a square-wave or equivalent half-sine pulse of 1/120 second duration. This rating applies under specified test conditions and supports transient clamping in short-duration overvoltage events. Continuous operation must remain within the 3.3 mA DC Zener current limit to avoid exceeding 400 mW dissipation at 75°C lead temperature.
Is 1N986B RoHS compliant?
Yes, the 1N986B is available in RoHS-compliant version with "e3" suffix (e.g., 1N986Be3), featuring annealed matte-tin plating per MIL-STD-750 Method 2026. The base 1N986B part uses traditional tin-lead plating. Both versions share identical electrical and thermal specifications; RoHS compliance is strictly a plating and material content distinction, not a performance difference.
How does the temperature coefficient affect 1N986B performance?
The 1N986B has a temperature coefficient of +0.11 %/°C, meaning its Zener voltage increases by approximately 0.121 V per 1°C rise above 25°C. At 125°C junction temperature, VZ rises to ~121.1 V. Designers must account for this drift in precision references - either by limiting self-heating, using compensation networks, or selecting operating points where coefficient-induced error stays within system tolerance bands.
1N986B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 110 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 750 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 83.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-7
1N986B FAQ
1.How can I place an order for 1N986B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N986B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N986B reliable?
The price and inventory of 1N986B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N986B is usually 5 days.
3.What payment methods are accepted for 1N986B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N986B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N986B?
1N986B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N986B order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N986B?
For technical support, including 1N986B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N986B requirements.
6.How does Aetrix verify that 1N986B is sourced from the original manufacturer or authorized distributors?
All 1N986B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N986B meets industry standards.
7.What is the process for return or replacement of 1N986B?
All 1N986B units undergo pre-shipment inspection (PSI). If there is an issue with 1N986B, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N986B part is unused and in its original packaging.
Return procedure for 1N986B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N986B Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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